After attend the MET Gala 2015, Lady Gaga was spotted heading to the 'Diamond Horseshoe' nightclub in New York City to host the official MET after party alongside Alexander Wang. Music artist and celebrities like Madonna, Katy Perry, Usher, Miley Cyrus, Juntin Bieber, Lorde, Rita Ora, Miguel, DJ White Shadow, Diplo, Uma Thurman, Jennifer Lawrence, Donatella Versace and Kim Kardashian attended Gaga's party. Gaga arrived around midnight in a tiara and plunging black sequined jumpsuit with attached platform boots. Click below and check out the photos.